Eliminate filamentous algae naturally and permanently from your reef tank
Filamentous algae are a common problem in reef aquariums. These long green or brown algae quickly colonize live rock, sand, and even corals. If left unchecked, they threaten the balance of your tank. In this article, we explain where they come from, their dangers, and how to eliminate them naturally and sustainably.
1. What are Filamentous Algae in Reef Tanks?
Filamentous algae belong to a group of opportunistic algae, capable of rapid growth whenever there is an excess of nutrients (NO3 and PO4). They appear as slimy green or brown filaments, often difficult to remove manually because they regrow quickly.
2. Where Do They Come from?
The causes of their appearance are varied:
– Excess nutrients (nitrates and phosphates).
– Lighting too intense or too long.
– Insufficient flow.
– Contaminated RO water (silicates, nitrates, phosphates).
– Overfeeding and organic waste.
👉 They often appear in young or unbalanced tanks.
3. What are the Risks Associated with Filamentous Algae?
– Visual pollution: they give the tank a dirty and neglected appearance.
– Smothering corals: by covering their surface.
– Nutrient competition: they consume nutrients at the expense of microfauna.
– Rapid spread: they can invade the entire aquarium in a few days.
4. How to Eliminate Them Naturally and Sustainably?
1. Reduce nutrients (NO3/PO4)
– Regular water changes with quality RO water.
– Use of an efficient skimmer.
– Anti-phosphate resins if necessary.
2. Optimize lighting
– Photoperiod: maximum 8 hours per day.
– Check the reef LED spectrum.
– Avoid direct natural light.
3. Improve flow
– Recommended flow rate: 20 to 40 times the tank volume.
– Multiple pumps oriented differently.
4. Introduce a clean-up crew
– Snails (turbo, trochus).
– Urchins (Mespilia globulus).
– Herbivorous fish (yellow tang).
5. Use a biological solution
👉 The Symbio® Anti-Cyano Kit from Atelier Récifal contains an exclusive blend of bacteria and enzymes that rebalance the tank and deprive algae of their food. A 100% natural solution, safe for your corals and fish.
Conclusion
Filamentous algae are not inevitable. By correcting the causes (nutrients, lighting, flow) and using a suitable natural solution, you can restore a balanced and aesthetic reef tank. The Symbio® Anti-Cyano Kit is the sustainable solution to eliminate algae and preserve your corals.
FAQ – Reef Filamentous Algae
1. Do filamentous algae disappear on their own?
👉 No, they require corrective actions.
2. What is the main cause?
👉 An excess of nutrients (NO3 and PO4).
3. Are snails enough to eliminate them?
👉 No, they help, but you also need to correct the parameters.
4. Should the light be turned off to eliminate them?
👉 No, you need to reduce the intensity and duration, but not remove it completely.
5. Is the Symbio Anti-Cyano Kit safe?
👉 Yes, it is 100% natural and has no negative impact on your inhabitants.
